Reversing-gear for internal-combustion motors.



G. CARELS. REVEBSING GEAR PoR INTBRNALOOMBUSTION Mo'rons.

APPLICATION FILED APBJB, 1910.

1,019,947. Patented Mar.12.1912. l

UNIT

S ATES PATENT OFFICE..

GUSTAVE CARELS, OF GHENT, BELGIUM, ASSIGNOB, TO SOCIT ANONYME CARELS FRERES, OF GHENT,.BELGIUM, AND MESSRS. LEWIS SCHNEIDER & C0., OF CREUZOT,

FRANCE.

REVERSING-GEAR FOR INTERNAL-COMBUSTION' MOTORS.

Specification of Letters Patent.

Patented Mar. 12, 1912.

Application led April 13, 1910. Serial No. 555,236.

. To all whom "Zt may concern:

ments in Reversing-Gear for lnternal-Combustion Motors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such las will enable others skilled in the art to which it apertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has for its object tol provide an improvedreversing gear for internal combustion motors whereby the motor can be reversed by carrying out in succession thel following operations, namely: (1) stopping the admissionof the combustible m1xture; (2) shifting the valves into the positions for producing the reverse motion of the motor; (3) admitting compressed air for producing first a braking action and then the reverse motion of the motor; and (4) readmittiug the combustible mixture.

It has already been proposed to carry out the above stated operations by the following characteristic means zw' he cams actuating the Several valves are keyed on one and the same shaft. By shifting this shaft longitudinally, the cams controlling the admission y are changed and they are caused to move from the position for producing motion of the motor in one direction, into the position for producing the reverse motion. That arrangement has the Vdisadvantage that the longitudinal shifting of the shaft can be effected only after the exhaust valves have been opened, necessitating a loss of time and thel provision of special mechanism.

Now the present invention has for its object to edect the desired reversal of the direction of the motor by means of a simple mechanism, easy to make and easy to operate with precision.

The invention consists substantially in providing two shafts, one shaft carrying the cams that control the admission of the fuel scavenging; the eccentric that controls the.

reilfersing operation being carried by a fixed ax e.

The accompanying drawings illustrate by way of example one construction of the limproved mechanism, Figure 1 being an elevation, and Fig. 2 a plan thereof.

3 is the lever controlling the admission of the combustible mixture, and 4 is the lever controlling the admission of the compressed air. These two shafts are actuated by the shaft 2. The lever 6 controlling the exhaust valve is actuated by the shaft l. The rotary shaft 2 is also movable in the direction of its length and it carries cams 4a and 4b for con` f trolling the admission of the compressed air, and cams 3 and 3b for the admission of the fuel for both directions of motion of the motor. The shaft 1, which is fixed against axial movement, carries an ordinary cam 1JL that revolves loose betweenv a tappet l placed in the desired position on the shaft to position the cam portion 1c to open, and so retain the exhaust port, during the desired period, that is, when the rotation of shaft l is reversed, there is a certain amount of lost motion between the shaft and cam 1' until the tappet '1b carries the cam with it and so positions portion lc thereof for the desired actuation of the exhaust port control means.

Upon the eccentric 5 that serves as a support for the levers 3 and 4J there is fixed a sector having three notches which correspond to the positions of starting the motor, stopping the motor, and admission of the 'compressed air.

operator, until the cams 3b and 4b, for backward motion, come under the said levers. As the motor continues to revolve by the action of the flywheel, or the propeller in the case of a boat, t-he operator places the sector at the notch for admitting the compressed air. The compressed air entering the motor cylinder at from about V501to470per cent. of the length of the stroke in front of the outer dead center' of the piston, exerts a braking action upon the motor and finally causes the motor to move in the opposite, z'. e. the vrearward direction. After a few revolutions, the operator places the sector at the running notch, and thev motor is then worked in the usual way by means of fuel.

Claimsl. An engine con'iprising in combination, a cylinder provided with fuel and fluid pressure valved inlets, a valved exhaust outlet, an adjustable eccentric shaft, a fuel valve vcontrol lever' mounted on the said shaft, a iuid pressure valve control lever mounted on the said shaft, a rotatable and longitudinally adjustable cam shaft, a plurality of sets of cams on said shaft adapted to operate said fuel valve control. lever and said tiuid pressure valve control lever, for either forward or reverse movement of the engine shaft, when disposed in the path of said levers, means shifting said eccentric shaft whereby` both of the said levers, thetluid pressure valve control lever, or neither of the levers are in the path ofthe said cams, a rotatable shaft provided with a cam, and a lever operative by the said ca m for actuating said exhaust valve. i 2. An engine comprising in combination, a cylinder provided with fuel and fluid pressure valved inlets, 4a valved exhaust outlet, an adjustable eccentric shaft, a fuel valve control lever mounted on said shaft, a fluid pressure valve control lever mounted-on the said shaft, a rotatable and longitudinally adjustable cam shaft, a plurality of sets of cams on said shaftv adapted to operate Said fuel valve control lever and said Huid pressure valve control lever, for either for` ward or reverse movement of the engine shaft, when disposed in the path of said levers, means shifting said eccentric shaft whereby both of said levers, the liuid pressure valve control lever, or neither of the levers are in the path of the said cams, and

means for operating said exhaust valve.

3. An engine comprising in combination, a cylinder,provided `with fuel and lluid pressure valved inlets, a valved exhaust outlet, an adjustable eccentric shaft, a fuel valve control lever mounted on said shaft, a fluid pressure valve control lever mounted on the saidshaft, a rotatable and longitudinally' adjustable cani shaft, a plurality of sets of cams on said shaft adapted to operate said fuel valve control lever and said fluid pressure valve control lever for either forward or reverse movement of the engine shaft, when disposed in .the path of said levers, meansadjusting s'aid cam shaft whereby the sets of cams may be located in' operative relation to said levers to provide for either forward or reverse movement .of the engine shaft, means shifting said eccentric shaft wherelnv both of the said levers, the tiuid pressure valve control lever, or neither of the levers are in the path of the said cams, a rotatable shaft provided with a cam, and a lever operative by the said cam for actuat ing said exhaust. valve.

L An engine comprising in combination, a cylinder provided with fuel and tiuid pressure valved inlets, a valved exhaust outlet, an adjustable eccentric shaft, a fuel valve control lever mounted on said shafta iuid pressure valve control lever mountedv on the said shaft, a rotatable and longitudinally adjustable cam shaft, a plurality of sets of 'cams on said shaft adapted to operate said fuel valve control lever and said fluid pressure valve control lever for either-forward or reverse movement of the engine shaft, when disposed in the path of said levers, means for adjusting said cam shaft whereby the sets of cams may be located in operative relation' to said levers to provide for either forward or reverse movement of the engine shaft, means shifting said eccentric shaft whereby both of the said levers, the fluid pressure valve control lever, or neither of the levers are in the path of the vsaid cams, and means for operating said exllaust valve.

In testimony that I claim the foregoing` as nay-invention, I have signed my name in presence of two subscribing witnesses.

GUSTAVE- CABEIJS.

l/Vitnesses: I i

ALFRED LUCKMANN, HENRI l'tossnLn'r. 

